Watchmaker&#39;s temper removing tool



R E Z N u M A. A.

WATCHMAKERS TEMPR REMOVING TOOL 2 Sheets-Sheet 1 Filed Oci.. l. 1956 INV ENTOR ATTORNEYS A. A. MUNZER WTCHMAKER'S TEMPER REMOVING TOOL Filed Oct. l, l95 Y 2 Sheets-Sheet 2 United Stats ateiiitffv i WATCHMAKERS TEMPER REMVING TOOL Arby A. Munzer, Jeffersonville, 1nd.

Application October 1, 1956, Serial No. 613,261

Claims. (Cl. 219-19) The, present invention relates to temper removing tools for watchmakers for removing the temper in watch parts. I, vThe primary object of the invention is to provide means for readily removing the temper from selected portions of watch and clock parts so that these portions may be machined as desired.

Another object of the invention is to provide a detempering tool in which the parts `being detempered are arranged to have a ow of electricity conducted therethrough.

Another object of the invention is to provide a watch parts detempering tool in which work clamping members are provided in the tool for securing the parts under detempering action during the detempering operation.

A further object of the invention is to provide apparatus for detempering selected portions of watch parts which is inexpensive to manufacture, simple to use, and which is completely effective in its action.

Other objects and advantages will become apparent in the following specification when considered in the light of the attached drawings, in which:

Figure .1 is a perspective view of the invention.

Figure 2 is an enlarged vertical cross-section taken along the line 2-2 of Figure 1, looking in the direction of the arrows.

Figure 3 is a transverse cross-section taken along the line 3-3 of Figure l, looking in the direction of the arrows.

Figure 4 is another transverse cross-section taken along the line 4-4 of Figure l, looking in the direction of the arrows.

, Figure 5.is an enlarged top plan view of the invention.v

Figure 6is a fragmentary longitudinal cross-section taken along the line 6-6 of Figure 5, looking in the direction of the arrows.

' Figure 7 is an enlarged fragmentary side elevation of the invention shown partially broken away and in section, and illustrating another use of the device.

Figure 8 is a plan view of a rheostat used with the device and illustrating in diagrammatic forni the circuit used with the invention.

Figure 9 is a plan view of an attachment used with the invention.

yFigure l0 is a side elevation shown partly broken away andin section of the attachment illustrated in Figure 9.

Figure 1l is a bottom plan view of the invention.

Referring now to the drawings in detail wherein like reference characters indicate like parts throughout the several figures, the reference numeral 2t) indicates generally a detempering tool constructed in accordance with the invention. v Y

The detempering tool 20 consists of an elongated rectangular solid body 21 having a relatively large bore 22 extending completely therethrough in a longitudinal direc tion. `A bore 23 of a size somewhat smaller than the bore 22 likewise extends longitudinally completely through` the; body -21 inparallelzrelation. to the bore 22..

dliili A bore 24 extends into the body 21 from the lower end 25 thereof and terminates at a point spaced inwardly from the bottom 25. The bore 24 extends parallel to the bore 23.

The body 21 is provided with an opstanding boss 26 of cylindrical cross-section projecting above the top wall 27 of the body 21. The cylindrical boss 26 is axially aligned with the bore 22 and the bore 22 passes therethrough. The body 21 is provided with a longitudinally extending groove 23 beginning at the top wall 27 thereof and terminating in a rectangular slot 29 extending from the groove 23 into the body 21 communicating with the bore 22. The rectangular slot 29 is positioned intermediate the ends of the body 21 for reasons to be assigned. A bore 3d projects longitudinally of the body 21 opening into the rectangular slot 29, as best seen in Figure 2.

The body 21 is provided with a transverse threaded bore 31 extending inwardly from one side thereof and intersecting the -bore 24 and receives a screw 32 which is screwed therein and has the head 33 thereof received in a recess 34 provided in the side of the body 21, as best seen in Figure 3.

A cylindrical shaped insulating member 35 is mounted within the bore 22 of the body 21 and extends from the lower end 25 of the body 21 to and through the cylindrical boss 26. The insulator 35 has an axial bore 36 extending inwardly thereof from the lower end 37 of the insulator terminating at a point 38 spaced inwardly at a substantial distance from the lower end 37 thereof. A second axial bore 39 extends from the terminal end 38 of the bore 36 longitudinally and axially of the insulator 35 opening through the upper end 40 of the insulator 35.

The insulator 35 has a semi-cylindrical cut out portion 4l adjacent to and communicating with the slot 29 in the body 21. An elongated shaft 42 is mounted within the bore 39 for reciprocation therein and has a flattened portion 43 formed thereon in general alignment with the rectangular slot 29 and semi-cylindrical cut out portion 41 for reasons to be assigned. The shaft 42 has an env larged end portion 44 mounted for reciprocation in the bore 36, as best seen in Figure 2.

Tre inner end 45 of the enlarged portion 44 at its juncture with the shaft 42 provides a shoulder seat for a coil spring 46 positioned within the bore 36 and having .y its opposite end engaged against the inner end 38 thereof.

The coil spring 46 normally biases the shaft 42 and enlarged end portion 44 thereof toward the lower end 25 of the body 21 for reasons to be assigned.

A resilient metallic switch arm 47 is provided with a reverted offset end portion 48. The resilient switch arm 47 is provided with an insulating sleeve 49 and is positioned within the groove 28 in the body 21. The upper end of the switch arm 47 is provided with an offset wire clamping socket 50, as shown in Figure '1.

A screw 51 is provided for securing the switch arm 47 to the body 21 and has an insulating washer 52 under the head thereof, an insulating bushing 53 surrounding its shank, and a second insulating washer 54 interposed between the body 21 and the switch arm 47. The switch arm 47 is pierced by the insulating bushing 53 and is completely insulated from the screw 51 and the body 21.

A wire 55 extends through the bore 23 and is clamped at its upper end in the wire socket Sti onthe switch arm 47. A button 56 formed of dielectric material is slidably` positioned on the switch arm 47 below the insulating sleeve 49 and is utilized to press the reverted portion 4% of the switch arm 47 into contact with the shaft 42 at the flattened portion 43 thereof. A pin 57 is formed on the button 56 and projects downwardly therefrom in general parallel relation to the spring arm 47. The pin 57 is adapted to be received within the bore 30, as shown in broken lines in Figure 2, by sliding the button 55 downwardly on the spring arm 47 thus locking the reverted portion 48 thereof into contact with the shaft 42.

The boss 26 has a reduced end portion 55 on which is seated a metallic jaw 59, as shown in Figure 2.

The shaft 42 at its upper end is provided with a reduced threaded end portion 66 on which is threadedly engaged a metallic jaw 61. A pin 62 is secured to the jaw 6i and depends therefrom. A tubular insulating bushing 63 encompasses the pin 62 and is received through an aligning bore 64 in the jaw 59. The function of the pin 62 is to maintain the relative alignment of the jaws 59 and 61 during the use of the detempering tool 29.

A wire 65 extends into the bore 2d and is clamped therein in electrical contact with the body 2l by means of the screw 32, as shown in Figure 3. The wires 55 and 65 extend to a rheostat indicated generally at 66, which is connected by means of wires 67 and 6d to a source of electrical energy such as battery 69 orany 1l() volt source. A screw eye 70 extends from the bottom 25 of the body 21 and is useful for supporting the tool 2) when out of use.

The ow of current through the deternpering tool is as follows: Electricity ows in the wire 65 through the screw 32 into the body 2i and directly into the jaw 59. The current then flows through the balance wheel 9i into the jaw 6l and through the shaft d2 into the switch 47. The current then iiows through the wire clamping socket 50 to the wire 55 clamped therein to complete the circuit. The wires 55 and 65, of course, being connected to a source of electricity.

The jaws 59 and 61 have identical congurations consisting of elongated wedge shaped portions 7i and 72, and oppositely extending parallei edged offset portions 73 and 74. The offset portions 73 and 74 are recessed at 75 and 76, respectively, and are adapted to grip a watch part therebetween as will be later described.

Referring now particularly to Figures 9 and l0, an attachment generally indicated at 77 is provided for use with the detempering tool 26 for detempering specific minute watch parts of a size too small to be handled by the detempering tool 20. The attachment 77 cornprises a metallic panel 7 8 having a right angular integral extension 79 secured thereto and forming a part thereof. The panel 78 is provided with a relatively large bore 80 centrally arranged thereon and adjacent its outer edge. The panel 78 is further provided with a pair of oppositely disposed small bores 81 on opposite sides edges of the bore 39, and a second pair of oppositely disposed slightly larger bores 82 are also positioned on opposite sides of the bore 80.

A ceramic block S3 is secured to the underside of the panel 78 and to one side of the extension 79. An arm 84 is embedded in the ceramic block 23 and is coextensive with the arm 79. The arm is arranged in spaced parallel relation to the arm 79. An electric resistance heating coil 85 is embedded in the ceramic block 53 and has one end thereof electrically connected to the arm S4 and the other end thereof electrically connected to the arm 79.

A resilient spring clamp arm 36 is pivotally secured to the panel 7S by means of a screw 87 and is spaced from the panel 7S by a washer 85. The outer end of the clamp arm 86 is provided with a pair or" bores S9 and which are adapted to overlie the bores 3l and d?. on either side of the bore Si) for reasons to be assigned.

The arms 79 and 84 are received between the jaws 59 and 6i and are in electrical contact therewith.

In the watchmakers art the replacement of broken balance stais in balance wheels, cementing relier jewels in roller tables, setting jewels in pallet forks, ceinenting stones in rings, removing temper in sinail parts, and tempering small parts, has been accomplished only with considerable ditliculty and only after a great deal of training and experience. The present invention is intended to carry out these purposes and to that end the invention is used as follows.

A balance Wheel 9i is arranged with its stati 92 clamped between the portions 7i and 72 of the jaws 59 and 61, as best seen in Figures l, 5 and 6. A hand 93 on the rheostat 66 is then adjusted so that the desired current will flow to the jaws 59 and 6i, upon the closing of the switch 47 and current will flow through the staff 92 as long as the reverted portion 43 of the arm 47 is in contact with the shaft 42. The staff 92, due to its resistance of the how of electricity therethrough, wiil be heated by the electrical iiow and the temper of the staff 92 will be removed.

The jaws 59 and 6i are then opened by pressing the enlarged portion d4 of the shaft 42 upwardly against the tension of the spring 46 spreading the jaws 59 and 61 and permitting the balance wheel 9i to be removed. The jaws 59 and 6i are normally held in contact with the balance staff 92 by the spring 46. After the temper has been removed from the stati 92, one end thereof can be chucked into a jewelers lathe and the staff 92 easily cut to permit the balance wheel 91 to be removed therefrom. In trying to cut a tempered stati from a balance wheel, the balance wheel is often damaged beyond repair.

Referring now to Figure 7, a balance wheel 93 is shown with a jewel roller table 94 positioned in recesses 75 and 76 in the jaws 59 and 61 so that electric energy can tiow through the roller table 94 upon energization of the jaws 59 and 61.

A roller jewel 95 is secured to the roller table 94 by means of shellac which will soften when heated and harden when cooled. To replace the roller jewel 95, the roller table 94 is heated to a degree controlled by the setting of the rheostat hand 93, and the roller jewel 95 can be removed and replaced without damaging the balance wheel 93 in any way.

In Figure 9, a pallet fork 96 is arranged on the panel 78 with its stal 97 extending into the bore S2 at the lower end and into the bore 96 of the clamp arm 86 at its upper end. The pallet fork 96 has spaced apart pallet jewels 9S and 99 secured to opposite ends of an arm 1x00 by means of shellac of the type which will soften when heated and harden when cooled.

With the arrangement illustrated in Figures 9 and l0, the resistance heating coil 85 will be heated by the passage of electricity therethrough iiowing from the jaws 59 and 61 through the arms 79 and 84. The heating of the electrical coil 85 will heat the panel 78 sufiiciently to melt or soften the shellac holding the jewel 9S. The jewel can then be adjusted, removed, and replaced as desired.

The flow of electricity in the coil 35 is as follows: The arms 79 and 84 are insulated from each other and are electrically and mechanically connected to the jaws 59 and 61. The coil 85 is connected between the arms 79 and 84 so that the circuit is completed therethrough.

It should be noted that the jewel 99 overlies the bore and hence will not be heated by the panel 78A so that the shellac securing the jewel 99 will not be melted. The provision of bores 81 and 82 on opposite sides of the bore 80, and of varying sizes, permits pallet forks of any construction to be secured therein.

Other watchmaking operations not specically illustrated and described, such as detempering watch bands to permit enlarging the hole therein, can be readily accomplished with the equipment by proper setting of theV rheostat hand 93 and by holding the swich 47 closed the required amount of time. The switch 47 can be locked closed by inserting the pin 57 in the bore 30 when it is necessary to maintain the heat for a considerable period of time when adjusting the jewels in a pallet fo'rk and similar operations.

Having thus described the preferred embodiment of the invention, it should be understood that numerous structural modifications and adaptations may be resorted to without departing from the scope of the appended claims.

What is claimed is:

1. A watchmakers tempering and detempering tool comprising an elongated body, a relatively at elongated jaw secured to one end of said body and extending transversely thereof, a shaft extending all the way through said body and slidably positioned therein, said shaft extending through Isaid jaw, a second jaw having a peripheral configuration identical to said first jaw carried by one end of said shaft with said jaws in adjacent parallel relation, means in said body biasing said shaft in a direction to close said jaws, means connecting said jaws to a source of electric energy, and means in said body for interrupting the flow of electric energy to said jaws.

2. A device as claimed in claim l wherein said shaft is mounted within a tubular insulating bushing extending through said body.

3. A watchmakers tempering and detempering tool comprising an elongated body, a relatively at elongated jaw secured to one end of said body and extending transversely thereof, a shaft extending through said body and slidably positioned therein, said shaft extending through said jaw, a second jaw having a peripheral configuration identical to said rst jaw carried by one end of said shaft with said jaws in adjacent parallel relation, means in said body biasing said shaft in a direction to close said jaws, means connecting said jaws to a source of electric energy, means in Isaid body for interrupting the ow of electric energy to said jaws, and means for locking said means foi interrupting the flow of electric energy in non-current interrupting position.

4. A watchmakers tempering and detempering tool comprising an elongated body, a relatively flat elongated jaw secured to one end of said body and extending transversely thereof, a shaft extending through said body and slidably positioned therein, said shaft extending through said jaw, a Ksecond jaw having a peripheral configuration identical to said first jaw carried by one end of said shaft with said jaws in adjacent parallel relation, an insulated guide pin lixedly secured to said second jaw and extending through a bore in said rst jaw, means in said body biasing said shaft in a direction to close said jaws, means connecting said jaws to a source of electric energy, and means in said body for interrupting the flow of electric energy to said jaws.

5. A device as claimed in claim 1 wherein a panel having an electric heating coil associated therewith is secured between said jaws in electrical contact therewith.

References Cited in the le of this patent UNITED STATES PATENTS 1,308,655 Brown `luly l, 1919 2,230,665 Green Feb. 4, 1941 2,504,338 MacLatchie Apr. 18, 1950 2,617,006 Syrstad Nov. 4, 1952 2,636,971 Delbrook ..n Apr. 28, 1953 

